Even a bad logo shouldn't be changed except for very good reasons.
Because a logo doesn't represent a company.  The company represents
the logo.  If you're a lousy company, your logo is useless, no matter
how well designed.  If your logo is good, and you're a good company,
you have an ideal situation.  If the company is bad, it's a bad logo.
So the idea of changing a logo without recognizing the importance of
the change is stupid.

		-- Paul Rand